Hack-saw frame



March 16 1926.

BACK SAW FRAME Filed June 17, 1925 INVENT R ATTORNEY I WITNESS:

fatented Mar. 16, 1926.

UNETED STATES CLIFFORD S PEAG-UE, OF ST. LOUIS, MISSOURI.

HACK-SAW FRAME.

Application filed. June 17, 1925. Serial No. 37,807.

To all 707mm if m my concern Be it known that I, Cnrrronn Srnnoun, a citizen of the United States, residing in the city of St. Louis and State of Missouri, have invented new and useful Improvements in Hack-Saw Frames, of. which the following is a specification.

This invention relates to in'iprovements in back saws and has for an object the provision of a saw frame which may be adjusted to accommodate blades of different lengths, novel means being provided for adjusting the frame to maintain the blade at a proper tension.

Another object of the invention is the provision of a hack saw frame which is constructed to permit of its use in restricted places and is capable of being extended so as to reach places ordinarily inaccessible.

With the above and other objects in view, the invention further includes the following novel features and details of construction, to be hereinafter more fully described, illustrated in the accompanying drawings and I pointed out in the appended claims.

In the drawings Figure 1 is a side elevation of a hack saw constructed in accordance with the invention and partly broken away.

Figure 2 is an enlarged fragmentary section taken longitudinally of the tubular member of the saw frame.

Figure 3 is an enlarged fragmentary view partly in section illustrating the connection between the handle and the handle extension.

Figure at is a section on the line 4--l of Figure 2.

Figure 5 is an enlarged section on the line 55 of Figure 1.

Referring to the drawings in detail wherein like characters of reference denote corresponding parts, the saw frame is shown as comprising a tubular member which is interiorly threaded at one end as indicated at 11 and which is adapted to receive within its opposite end, the inner end of a bar 12. This bar is capable of sliding movement within the tubular member 10 but this movement is limited by a pin 13 which extends through the tubular member and within a notch or groove ld'provided in the bar 12. In addition to providing for limited longitudinal movement between the tubular member and bar 12, the connection just described also prevents relative rotary movement between these two elements. The outer end of the bar 12 is provided with a blade engaging element 15 which is adapted to engage-the outer end of a blade 16, while the inner end of the said blade is conn cted to a blade engaging element 17 which is carried by the tubular member 10.

The s w frame is provided with a handle or grip 18 which includes a threaded shank 19 and the latter is adapted to be removably positioned within the threaded end of the tubular member 10 and to engage the inner end of the rod 12 so that they rod and tubular member may be relatively adjusted to adjust the blade engaging elements 15 and 17 relatively and maintain the blade 16 at proper tension. These blade engaging elements 15 and 17 comprise laterally ex tending pins illustrated in Figures 4 and 5 of the drawings.

The handle or grip 18 is preferably provided with an extension in the form of a rod 20, the inner end of which is provided with a threaded socket 21 to receive the threaded shank 19 of. the handle or grip 18. This permits the frame to be extended so that the saw may be used in otherwise inaccessible places and thus save labor otherwise required in disassembling or dismantling machines or devices.

The invention is susceptible of various changes in its form, proportions and minor details of construction and the right is herein reserved to make such changes as properly fall within the scope of the appended claims.

Having described the invention what is claimed is 1. A saw comprising a tubular member, 1

means to attach the inner end of a saw blade to said member, a rod having its inner end slidable within the tubular member, means at the outer end of the rod to engage the outer end of a saw blade and a saw handle engaging the inner end of the rod to adjust thi'e blade engaging means relative to the rod.

A saw comprising a tubular member, nleans to attach the inner end of a saw blade tt) said member, a rod having its inner end slidable within the tubular member, means at the outer end of the rod to engage the outer end of a saw blade and a saw handle adjnstablv associated with the tubular member to aojust the blade engaging means relative to the rod and means connecting the tubular member and rod to permitlimited lQlfil'lVO movement of said member and rod.

A saw comprising a tubular member, means to attach the inner end ot a saw blade to said iii'lember a rod having its inner end slidablewithin the tubular member, means at the outer end of the rodto engage the onterend of a saw blade and a saw handle adjustable within the tubular member and engaging the inner end of the rod to adjust the blade engaging means relative to the rod and an extension handle section remov ably secured to the frame.

In testimony whereof I atlix mv signature.

CLIFFORD SPRAGUE. 

